1Department of Physiology, School of Medicine, Instituto de Investigaciones Sanitarias (IDIS), University of Santiago de Compostela, 15782 Santiago de Compostela, Spain2CIBER Physiopathology of Obesity and Nitrition (CIBERobn), S. Francisco s/n, 15782 Santiago de Compostela, Spain3Department of Physiology and Internal Medicine, School of Medicine, National University of Colombia, 11001000 Bogota, Colombia4Central Service of Proteomic Unity for Research (SCAI), University of Cordoba, 14071 Cordoba, Spain5Department of Cell Biology, Physiology, and Immunology, University of Cordoba and Maimonides Institute of Biomedical Research (IMIBIC), 14014 Cordoba, Spain

Received 23 June 2011; Revised 19 August 2011; Accepted 19 August 2011